![]() ![]() Given that the underlying authentication system is the same, there's no good reason for this except to encourage heavy 2FA users not to use it with Steam. Steam is the only one that decided to make their system incompatible with this, so that you need a special, separate app on your phone and you can't do it at all on PCs. I’ll finish up by also elaborating on things common to both, HMAC-Based One-Time Password algorithm: QR Codes used to easily transfer secrets from the server to the Authenticator app Base32 algorithm. Here I’ll explain all the details around Time-based One-Time Password algorithm. Earlier this year Google released their time-based one-time password (TOTP) solution named Google Authenticator.A TOTP is a single-use code with a finite lifetime that can be calculated by two parties (client and server) using a shared secret and a synchronized clock (see RFC 4226 for additional information). That says absolutely nothing about why they use a proprietary interface in front of TOTP that prevents the use of standard multi-site TOTP authenticators such as Authy, Google Authenticator, 1Password, the Tray Totp plugin for KeePass 2, or many others.Īs I said, I do this sort of authentication on a couple of dozen different web sites, and for every one of them I use Authy on my phone and in Chrome browsers, and KeePass2 on PCs. Part 3 is the last part in this short cycle. The QR code communicates the secret key entropy and a helpful label for which service its for, in a simple way to the end user. The algo takes the system time and a secret key to generate a token. ![]() Category Theory původně napsal:I really wish someone at Valve would step up and explain why they feel it's better that you and I don't use 2FA than switching the standard 2FA system. The Google Authenticator app is simply an implementation of the Time-based One-time Passwords spec. ![]()
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